JPH0153004B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an abnormality detection device used in a granular material supply device such as a spot seeding machine or a fertilization device.

While being towed by a traveling device such as a tractor,
2. Description of the Related Art A seeding device is known in which seeds held in a tank (seed container) are sequentially supplied to a field through an annular passage by a seed feeding means such as a feeding roll or a perforated plate. The above seed feeding means is
It is configured to be driven by a driving wheel that is forcibly rotated by the resistance of the ground during movement, and a plurality of sets of these seed feeding means and driving wheels are provided in one device. Generally speaking, if the driving wheel that drives the seed dispensing means stops for some reason, normal sowing will not occur, so abnormality detection means can be used to quickly detect such an accident. It is preferable that the device be provided with the following. On the other hand, when the seeding device is lifted during rotation, etc., or when it stops running, all the driving wheels stop at the same time, but it would be troublesome if an abnormality would be determined and an alarm would be issued even in such cases. This is not practical as it increases the worker's stress.

In view of the above circumstances, this invention promptly detects when the normal rotational state of the driving wheels is no longer maintained, and also issues a false alarm when the work is interrupted due to an artificial operation such as when the vehicle stops running. The purpose of this device is to provide an abnormality detection device that does not require an abnormality detection device.
The point is that a determining means is provided that does not determine that there is an abnormality when all the driving wheels 5 have stopped. The embodiments shown in the drawings will be described below.

1 and 2 are a side view and a plan view showing the usage state of a seeding device as an example of a granular material feeding device, and FIG. 3 is an enlarged view thereof. A seeding unit (supply unit) includes a seeding machine 3 equipped with a perforated plate 2, a chain case 4 attached to the seeding machine 3, a driving wheel 5 provided at the lower end of the chain case 4, and a groove-making disk 6. ) 1a are provided in parallel. The driving wheel 5 has a large number of spike-shaped protrusions 7 on its outer periphery, and is forcibly rotated by the resistance of the field during work. This rotation is transmitted by the chain in the chain case 4 to the driving gear 8a which rotates together with the upper sprocket wheel, and is transmitted to the perforated plate rotating shaft 9 via the driven gear 8b. The perforated plate 2 has a hole 2a near its outer periphery into which the seeds are inserted, and is provided in the seed container 10 so as to be tilted and rotatable. A bottom plate 11 is provided on the lower surface of the perforated plate 2 in close contact with the perforated plate 2, and the seeds 12 stored at a low position in the seed container 10 are properly dropped into the holes 2a of the perforated plate 2. As the perforated plate rotates, it is carried up to the high position side, and the socket 13
It falls into the socket 13 through the through hole 14 bored in the bottom plate 11 at the position where it is provided. A seeding tube 16 is connected to the socket 13 via a cylindrical sensor section 15, and the lower end of the seeding tube 16 faces a groove formed in the field by the groove making disk 6.

The sensor section 15 is provided with a light emitting element and a light receiving element on the side of a cylindrical body through which the seeds pass, so as to sandwich the seed passage. It is connected to a circuit section 19 provided in the instrument panel section. The socket 13, the sensor section 15 and the seeding pipe 1
6 constitutes a seed passage.

Next, a rotation detection sensor 20 is attached to the chain case 4. The rotation detection sensor 20 is a reflective photo sensor equipped with a light emitting element 20a and a light receiving element 20b as shown in FIGS. 4a and 4b, and is mounted so as to face the teeth of the driven gear 8b. The presence of the end face 8c is detected. The light emitting element 20a is located between the teeth of the gear.
The light does not reach the light receiving element 20 and is not detected. Since the rotation detection sensor 20 only needs to be able to detect the rotation of the driving wheel 5,
It may be provided facing the side, or a sensor other than a photoelectric type may be used.

The base 22 of the seeding unit 1a is attached to a horizontal bar 26 attached to the rear end of a rear connecting member 24 of a rotary tiller 23 via a vertical column 25. In the illustrated example, four seeding units 1a are provided in parallel and are configured so that four rows of seeds can be sown at the same time. The front end of the base 22 is pivoted to a mounting member provided on the horizontal bar 26, and the intermediate portion of the base 22 is pressed downward by a pressing spring 29 provided on the outer periphery of the shaft 27. The front end portion of the rear connecting member 24 is pivotally connected to a connecting member 31 provided on a base body 30 of the rotary tiller 23, and the intermediate portion is connected to the base body 30 by a jack 32. By this jack 32, the rear connecting member 2
4 angles can be adjusted. The base body 30 to which the chain case 33 of the rotary tiller 23 is attached is connected to the rear part of a tractor 35. By rotating the lift arm 36 of the tractor 35 using a hydraulic device, the rotary tiller 23 and the seeding device 1 can be raised and lowered as one unit. This seeding device 1 is used while being towed by a tractor 35 together with a rotary tiller 23. In this use, the seed container 10 is placed in the field cultivated by the rotary tiller 23.
Seeds 12 inside fall at regular intervals, and soil is poured over them by the driving wheel 5.

FIG. 5 is a circuit diagram of an abnormality detection device that detects an abnormality based on a signal from the rotation detection sensor 20, in which the detection signal from the rotation detection sensor 20 is supplied to an integrating circuit via a pulse generation circuit. This charges the integrating circuit. When the pulse from the pulse generation circuit is interrupted, the discharge progresses,
The comparison circuit detects an abnormality (stopping of the driving wheel 5), but this result is input to the OR circuit together with the detection results from other seeding units installed in parallel, where a comprehensive judgment is made. It is done. That is, when the driving wheels of all four seeding units installed in parallel have stopped, it is determined to be normal, and when some of the driving wheels have stopped, it has been determined to be abnormal. For this reason, if an individual driving wheel stops for some reason during work, it is determined to be abnormal, but if the seeding device 1 is lifted during rotation, etc., all driving wheels stop at the same time, so it is considered normal. It is determined that the condition is the same. Depending on the result of this determination, an alarm means such as an alarm lamp L as shown in FIG. 6, for example, may be driven.

FIG. 6 shows a circuit diagram when the abnormality detection device shown in FIG. 5 is used in combination with a passage detection device for checking the passage of seeds. Passage detection sensor 1
The system is configured such that a comprehensive judgment is made by combining the detection results based on the signals from 8 and the detection results of the abnormality detection device for the driving wheels shown in FIG. That is, when the signal indicating the passage of seeds from each seed passage detection sensor 18 is interrupted for a certain period of time, it is determined that there is an abnormality, and the alarm lamp L' provided for each row is lit. In this case, if an abnormality is detected in the signals from the seed passage detection sensors of all the sowing units, the warning lamps L' of all rows will light up, but the abnormality detection device for the driving wheels will turn on all the driving wheels. If the vehicle is stopped, the abnormality alarm of the passage detection device is canceled and no alarm is issued. When some of the driving wheels are stopped and other driving wheels are rotating normally, the seeds will not fall normally in the sowing unit where the driving wheels have stopped, so the passage detection sensor will detect an abnormality. Detected. When a certain driving wheel stops rotating, the abnormality warning means (warning lamp L in the illustrated example) common to all driving wheels is activated, and the abnormality warning means (in the illustrated example) corresponding to the seed passage detection sensor of the relevant row is activated. Since the warning lamp L') is activated, it is possible to identify in which line the driving wheel stoppage accident occurred. Note that the passage detection device may be provided with an alarm buzzer Rz as shown in the illustrated example.

As explained above, the abnormality detection device according to the present invention determines that there is an abnormality when some of the plurality of driving wheels installed in parallel have stopped, and determines that it is normal when all of the driving wheels have stopped. Equipped with a determination device, if for some reason during work the driving wheels of some of the granular material supply units stop and normal supply is no longer possible, this can be immediately known and the system When work is artificially interrupted during a run, a false alarm indicating an abnormality is no longer issued even if the driving wheels stop rotating, making this system highly practical.

[Brief explanation of drawings]

Figures 1 and 2 are a side view and a plan view of a seeding device equipped with an abnormality detection device according to the present invention in a used state, Figure 3 is an enlarged view thereof, and Figures 4a and 4b are installations of rotation detection sensors. 5 and 6 are circuit diagrams of the abnormality detection device in different usage conditions. All figures relate to embodiments. 1... Seeding device, 1a... Seeding unit, 2...
... Perforated plate, 3... Seeding machine, 4... Chain case,
5... Driving wheel, 8b... Driven gear, 9... Perforated plate rotating shaft, 10... Seed container, 12... Seed, 13...
... Socket, 15 ... Sensor part, 16 ... Seeding pipe, 1
8...passage detection sensor, 20...rotation detection sensor, 23...rotary tiller, 35...tractor.

Claims (1)

[Scope of Claims] 1. Consisting of a driving wheel that is forcibly rotated by ground resistance during movement in the field, and a supply means that uses the rotational power of the driving wheel to sequentially supply granules to the field through a predetermined path. This is an abnormality detection device used in a granular material supply device equipped with multiple sets of supply units, which determines that there is an abnormality when some of the driving wheels have stopped, but it is determined that there is no abnormality when all of the driving wheels have stopped. An abnormality detection device for a particulate material supply device, characterized in that it is provided with a determining means for determining that there is no abnormality. 2. The particulate supply device is equipped with a sensor that detects the passage of particulates in each particulate passage, and an alarm means that issues an alarm when the signal indicating the passage of particulates from the sensor is interrupted for a predetermined period of time. An abnormality detection device for a granular material supply device according to claim 1, further comprising a passage detection device.